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Equibles

CITADEL ADVISORS LLC

Position in MKSI — Mks Inc

CIK 1423053 MIAMI, FL
Back to MKSI Full portfolio

Position in MKSI

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$310,323,615
+$92,686,192 QoQ
Shares Held
697,670
-26.3% QoQ
Ownership
1.03%
of shares outstanding
% of Portfolio
0.20%
of 13F equity value
Holder Rank
#22
of 767 holders
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in MKSI Over Time

Shares Held

Position Value (USD)

Derivatives in MKSI

reported options exposure · as of Jun 30, 2026
CallValue
$38,831,040
CallShares
87,300
PutValue
$29,045,440
PutShares
65,300

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Scientific & Technical Instruments

Technology · as of Jun 30, 2026

CITADEL ADVISORS LLC holds $770,658,471 across 26 Scientific & Technical Instruments names. MKSI ranks #1 (40.3% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MKSI
Mks Inc
This page 		697,670 $310,323,615
2 KEYS
Keysight Technologies, Inc.
 555,953 $194,622,466
3 GRMN
Garmin Ltd
 281,919 $66,967,039
4 COHR
Coherent Corp.
 161,095 $63,547,144
5 NOVT
Novanta Inc
 481,821 $62,039,303
6 VNT
Vontier Corp
 674,348 $19,556,092
7 TDY
Teledyne Technologies Inc
 19,981 $13,325,328
8 ITRI
Itron, Inc.
 121,080 $10,477,051

All Filings in MKSI

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $29,045,440 65,300
2026-06-30 $310,323,615 697,670
2026-06-30 $38,831,040 87,300
2026-03-31 $7,147,091 31,100
2026-03-31 $217,637,423 947,032
2026-03-31 $12,800,417 55,700
2025-12-31 $73,168,105 457,873
2025-12-31 $6,999,240 43,800
2025-12-31 $7,159,040 44,800
2025-09-30 $6,906,366 55,800
2025-09-30 $17,471,125 141,158
2025-09-30 $3,527,445 28,500
2025-06-30 $3,338,496 33,600
2025-06-30 $3,954,528 39,800
2025-06-30 $14,510,334 146,038
2025-03-31 $7,445,935 92,900
2025-03-31 $2,348,395 29,300
2024-12-31 $2,755,896 26,400
2024-12-31 $2,275,702 21,800
2024-12-31 $3,874,956 37,120
2024-09-30 $11,043,087 101,583
2024-09-30 $3,435,236 31,600
2024-09-30 $1,250,165 11,500
2024-06-30 $5,184,026 39,700
2024-06-30 $6,308,058 48,308
2024-06-30 $4,061,038 31,100
2024-03-31 $3,990,000 30,000
2024-03-31 $7,700,700 57,900
2023-12-31 $1,779,651 17,300
2023-12-31 $2,843,121 27,638
2023-12-31 $5,740,146 55,800
2023-09-30 $4,500,080 52,000
2023-09-30 $462,036 5,339
2023-09-30 $4,681,814 54,100
2023-06-30 $10,715,736 99,128
2023-06-30 $5,545,530 51,300
2023-06-30 $6,626,530 61,300
2023-03-31 $4,749,411 53,593
2023-03-31 $6,575,604 74,200
2023-03-31 $2,800,392 31,600
2022-12-31 $4,516,956 53,310
2022-12-31 $4,340,294 51,225
2022-12-31 $113,029 1,334
2022-09-30 $2,546,138 30,810
2022-09-30 $3,993,578 48,325
2022-09-30 $551,869 6,678
2022-06-30 $2,206,545 21,500
2022-06-30 $8,682,498 84,600
2022-06-30 $17,896,311 174,377
2022-03-31 $4,980,000 33,200

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